Retention clip



FIG. 1 is a front view of a retention clip;

FIG. 2 is a back view thereof;

FIG. 3 is left view thereof;

FIG. 4 is a right view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a perspective front view thereof; and,

FIG. 8 is a perspective back view thereof. 

CLAIM The ornamental design for a retention clip, substantially as shown and described. 